If you are running ubuntu 12.04(precise) and one thing you might have noticed from your unity is missing Dodge Windows behavior.

Another feature users really like is the ability to be able to click a program's icon on the Launcher and minimize/unminimize that window. Jonathan French (ojno), the developer behind this patch, has not only made this a reality, but also got this to work in conjunction with the ‘Spread Windows' functionality. He's even set up a PPA which contains the latest Unity and his patch to make it easier for end-users to get it.
Thanks to isaacj87 ubuntuforum user for creating PPA for this

This PPA works 32-bit and 64-bit users

PPA installation instructions

Open the terminal and run the following commands

sudo apt-add-repository ppa:ikarosdev/unity-revamped

sudo apt-get update

sudo apt-get dist-upgrade

If you want to revert back to the official ubuntu packages run the following commands from your terminal

Agreed. No idea why this was removed (apparently it’s confusing for new users). And apparently the min, max, close buttons moving with the window when maximized and unmaximized when the menu does not move along with it is not confusing for new users???